SEER Inquiry System - Question 20091082 Details

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SEER Inquiry System - Report

Produced: 07/26/2025 1:26 PM

Question 20091082

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Inquiry Details

References:

2007 SEER Manual, 84

Question:

Behavior--Breast: How is this field coded for a case in which the final diagnosis reports DCIS, but the CAP protocol or microscopic findings show microinvasion? See Discussion.

Discussion:

1. Path report for breast cancer has final diagnosis as 'DCIS' but the CAP protocol in the body of the report says 'microinvasion seen, T1mic.'

2. Path report says 'DCIS' in the final diagnosis and microinvasion is identified in the microscopic portion of the report, but it is not in CAP protocol format and not stated in the final diagnosis.

Answer:

Code both scenarios /3 [malignant (invasive)]. Information regarding behavior is not limited to the final diagnosis or the CAP protocol. See page 84 in the 2007 SEER manual:

Code the behavior as malignant /3 if any portion of the primary tumor is invasive no matter how limited; i.e. microinvasion.

Cancer Site Category:

Breast

Data Item Category:

Behavior

Other Category:

N/A

Year:

2009